Forget Today’s Wi-Fi: A New Light-Based Wireless System Just Reached 362 Gbps on Half the Power

A revolutionary wireless system has achieved a groundbreaking combined speed of 362.7 gigabits per second in laboratory tests, researchers announced in March 2026. This innovative chip-based optical system, detailed in the journal Advanced Photonics Nexus, boasts an impressive energy efficiency, consuming roughly half the energy per bit of leading Wi-Fi technologies under comparable conditions.

The transmitter reached this remarkable speed by operating 21 miniature lasers simultaneously across a two-meter free-space link. Each laser carried its own data stream, delivering individual rates between 13 and 19 gigabits per second. According to the findings published by SPIE, the international society for optics and photonics, the combined output stands among the highest speeds reported for a chip-scale optical wireless transmitter paired with a free-space receiver.

Wi-Fi and cellular networks rely heavily on radio spectrum, which becomes increasingly crowded as devices multiply. Signal interference in dense indoor spaces and rising energy consumption compound the strain. Optical wireless communication sidesteps this interference by swapping radio waves for light, opening up far more available bandwidth.

A Chip Smaller Than a Millimeter Powers the System

The core of the system is a custom 5 by 5 array of vertical-cavity surface-emitting lasers, known as VCSELs. These infrared semiconductor lasers already appear in data centers and sensing equipment due to their efficient operation at high speeds and ability to be produced in large arrays using standard fabrication methods.

Scientists affiliated with the University of Cambridge built the array using established processes and mounted the finished chip onto a custom circuit board. As detailed in the study published in Advanced Photonics Nexus, the full laser array fits on a chip smaller than a millimeter. Each laser operates independently, allowing the system to push several data streams in parallel from the same chip.

Initial tests demonstrated stable output power and consistent high-speed modulation across the array. Of the 25 lasers on the chip, 21 were operational during the speed trials.

Shaping Light to Eliminate Interference

Maintaining multiple light beams simultaneously creates a practical challenge. Overlapping beams allow signals to bleed into each other, making it difficult for receivers to separate individual data streams. The research team solved this issue by developing a compact optical system that shapes and steers the light from the laser array.

A custom microlens array first straightens the light from each laser. Additional lenses then arrange the beams into a structured grid of square spots at the receiver plane, so each beam illuminates a defined area with minimal overlap. Measurements showed more than 90 percent uniformity across the illuminated region at a distance of two meters.

That structured light pattern also supports multiple users. In a test with four beams transmitting at once, each link remained stable, and the system delivered a combined data rate of about 22 gigabits per second, as reported by ScienceDaily. The results confirm that several optical wireless links can operate in the same room without meaningful interference.

Energy Efficiency Compared to Conventional Wi-Fi

The system consumed approximately 1.4 nanojoules per bit. This figure is roughly half the energy per bit reported for state-of-the-art Wi-Fi technologies in similar conditions.

Radio-based systems require more power to push higher data rates. The optical system draws less energy because its laser sources operate efficiently by design and can be driven directly at high speed without complex power management. During the tests, each laser used a modulation method that splits data into many closely spaced frequency channels, squeezing more out of the available bandwidth while adapting to shifts in signal quality.

A Technology Designed to Work Alongside Existing Networks

The researchers emphasized that optical wireless communication is intended to complement Wi-Fi and mobile networks, not replace them. Optical links can handle heavy traffic in indoor spaces where capacity is strained, easing the load on congested radio networks.

The study’s authors pointed out that the speeds they recorded were limited by the bandwidth of the commercial photodetector used during testing. A faster receiver paired with the same transmitter could push the data rate higher. The laser chip was produced using standard semiconductor manufacturing methods and mounted onto a custom circuit board for the lab demonstration.